Norforlk. The area is situated on a thick layer of glacial till or boulder-clay deposited over a geology of chalk. This till extends through Mid and South Norfolk and High Suffolk to form the East Anglian Boulder-Clay Plateau. Although the landscape today is very open and windswept, local place-names suggest the existence of substantial woodlands in the Late Saxon Period. The landscape is also situated in an area known as the Central Norfolk Watershed, where recorded archaeological finds (including metal detector finds) are often fewer than for neighbouring districts.